JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">
<button class="add">Add</button>
<div class="importrLinks">
  <ul class="cdnLinks">
  </ul>
</div>

CSS

/* Import Links */
    .importrLinks {
        /* float: left; */
        width: 100%;
        height: 400px;
        padding: 2em 0em;

        box-shadow: 0 0 10px 1px #e2e2e2;

        overflow: auto;
    }

        .importrLinks .cdnLinks {
            padding-left: 1.5em;
            list-style-type: decimal;
        }

            .importrLinks li.cdnLink {
                position: relative;

                margin: 1em;
                padding: 0.5em;
                border-radius: 3px;
            }

            .importrLinks li.cdnLink:nth-child(odd) {
                background-color: #B3DBEF;
            }

            .importrLinks li.cdnLink:nth-child(even) {
                background-color: #D4F3B9;
            }

                /* Delete Button */
                .importrLinks li.cdnLink .deleteLink {
                    display: none;
                    position: absolute;
                    top: 0.5em;
                    right: 0.5em;

                    color: #c62828;

                    opacity: 0.5;
                }

                .importrLinks li.cdnLink:hover .deleteLink {
                    display: inline-block;
                }

                .importrLinks li.cdnLink:hover .deleteLink:hover {
                    transform: scale(1.2);
                    
                    cursor: pointer;
                    opacity: 1;
                }

JavaScript

$('body').on('click', '.add', function(event) {
        addLink("https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/{version}/{type}/bootstrap{minifiedState}.{type}", "css", "3.1.0");
});

$('body').on('click', '.deleteLink', function(event) {
    console.log($(this));
$(this).closest('.cdnLink').remove();
});

function addLink(linkStructure, type, version) {
        var pattern = "{version}";
        var regEx = new RegExp(pattern, "g");
        var cdnLink = linkStructure.replace(regEx, version);

        pattern = "{type}";
        regEx = new RegExp(pattern, "g");
        cdnLink = cdnLink.replace(regEx, type);

        pattern = "{minifiedState}";
        regEx = new RegExp(pattern, "g");
        cdnLink = cdnLink.replace(regEx, ''); // Handle after adding minified radio buttons

        var finalTag = '<span class="tag">';
        if (type == 'css') {
            finalTag = finalTag + '&ltlink href="' + cdnLink + '" rel="stylesheet" type="text/css"&gt';
        } else {
            finalTag = finalTag + '&ltscript src="' + cdnLink + '"&gt&lt/script&gt';
        }
        finalTag = finalTag + '</span>';

        var deleteButton = '<span class="deleteLink fa fa-times"></span>';

        $('.importrLinks .cdnLinks').append('<li class="cdnLink">' + finalTag + deleteButton + '</li>');
    }